Pressure-operating device



July 15 1924. 1.501,239

C. C. RUNNER PRESSURE OPERATIHG DEVICE Filed Oct. 2''! 1920 In\/ entor- Claude C. Runner,

. Operating Devices, of which the following Patented July 15, 192

' UNITE STATES NT F CLAUDE C. RUNNER, OF SCHENEC'I'ADY, NEW YORK, ASSIGNOB TO COMPANY, A CQRPORATION OF NEW YORK.

Gasman. anacmc PRESSURE. -OPERATING' DEVICE.

. Applicationlled October 27, 1920. Serial No. man.

To all whom it may concern: 3

Be it known that I, CLAUDE C. RUNNER, a citizen of the United States. residing at Schenectady, in the county. of Schenectady, State of New York, have invented certain new and useful Improvements in Pressureisa. specification. n My invention relates to improvements in pressure operatin devices. Although not necessarily limite thereto, my. invention has a particular application to pressure operating devices used for operating motor controllers, -and when .so used it provides improvedf'ineans whereby abnormal conditions in the motor circuit, such for instance as a failure of voltage, are automatically taken care f in order to protect the motor.

One of the objects of my invention is to provide improved means whereby upon the occurrence of abnormal conditions, the pressure device will automatically operate to establish safe conditions. In carrying my invention into effect -in one form, I provide apressure' actuated device which is normally controlled by a pressure controllingI vallvle valve and the pressure actuated device I provide an electromagnetically controlled valve which is arranged so that when energized it gives complete control of the pressure actuated device to the controlling valve,

but when deenergized it governs the pressure actuated device independently of the controlling valve and causes the pressure actuated device to be returned to the initial position.- My invention has advantages in that the electromagnetically controlled valve is entirely independent of the pressure controlling valve, and the protective features of the device are in no way dependent upon the effective operation of the pressure controlling valve. A rigid mechanical connection with the pressure controlling valve may be provided. thereby insuring the effective operation of this valve. Advantageous. features of simplicity of construction and arrangement are obtained.

In the accompanying drawing I have shown my invention embodied in concrete form for purposes of illustration, the drawing being diagrammatic in some respects in order that an easy understanding of the invention may be had. Referring to the drawing, the pressure actuated device 10 comprising the cylinder 11, piston 12 and piston rod 13 is connected through a crank 14 with the operating lever 15 of a rheostat in the armature circuitof an electric motor havin an armature 1 6 and a shunt field 17. The ever 15 is, adapted to cut out sections of the controlling resistance 18-19 when the lever is moved in acounter-clockwise direction, and to reinsert the resistance when the lever is moved in a clockwise direction in response to a downward movement of the piston 12. A pressure controlling valve 20 having two pistons 21 and 22 is adapted to control the passages 23 and 24 leading from the pressure controlling valve to the pressure actuated devicelO for admitting pressure to and exhausting pressurefrom the said device. The

pressure controllin valve is automatically operated responsive y to predetermined conditions, such for instance as in response to the pressure exerted on the diaphr 25. The diaphragm 25 operates the vii: 20

through the pivoted scale beam 26, and the I is an electromagnetically controlled valve which is arranged so as to give normally the complete control of the pressure actuated device 10 to the pressure controlling valve 20 when the magnet 36 is energized and to operate independently of the pressure controlling valve when deenergized to admit pressure to and exhaust pressure from the pressure actuated device to effect the return of the rheostat lever 15 to a position at which all of the resistance 18-19 is included in the motorarmature circuit. This electroma et valve is provided with three pistons 3 38 and 39, the arrangement being such that the l piston 38 normal y closes the passage 40 between the pressure controllin valve and the electromagnet valve, and t e piston 89 closes the passage 41 when the valve magnet is ener 'zed. It will be observed that on the rightd side of the electromagnet 26 and the pressure controlling valve 20, and

that there are no mechanical connections be tween the movable elements of these parts.

There is a rigid mechanical connection,v

namely, the link 27, between the scale beam 26 and the pistons of the pressure controlling valve 20. The pressure controlling valve operates entirely independently of the *magnet 36 and the magnet valve 35 in general.

As thus constructed and arranged, and with the parts in the various positions shown in the drawing, thegoperation of my invention is as follows: Let it be assumed that the operation of the electric motor causes a fluid pressure to be produced which causes the diaphragm 25 to raise the scale beam 26. Th1s will in turn cause the link 27 to be raised and thereby move the lever 28 a small angular distance counter-clockwise, the lever 28 having its fulcrum point for this motion at 42. The pistons 21 and 22 of the pressure controlling valve 20 will be raised so as to open the passages 23 and 24, thereby admitting pressure to the upper side of the piston 12 through the passage 23, the electromagnet valve 35 and the passage 23', and at the sametime connecting the fluid under pressure on the lower side of the piston 12 to exhaust through the passage 24', the electromagnet valve 35, the passage 24 and the exhaust passage 43. This w1ll cause the piston 12 of the pressure actuated device 10 to be moved downwardly and thereby rotate the rheostat arm 15 in the clockwise direction, cutting in' more of the resistances 18-19 in the armature circuit of the electric motor. This will cause the motor to be operated at a lower speed, and in case the motion of the rheostat arm 15 is continued, the motor armature will be entirely disconnected from the supply circuit. and the motor stopped. It will be observed that the downward motion of the piston rod 13 produces a downward motion of the piston rod 29 0f the pressure controlling valve in order that the pressure controlling valve will be returned to the position shown in the drawing, thereby stopping further operation of the pressure actuated device. This is brought about through the crank 34 lowering the right-hand end of the lever 31 and thereby raising the left-hand end of the lever 28 through the medium of the link 30, the lever 28 this time having its fulcrum point-at 44.

necting the upper side of the piston 12 of the pressure actuated device to exhaust through the passage 23, the electromagnet valve35 and passage 23. The lower side of the piston 12 will have fluid pressure applied thereto through the passage 24, the electromagnet valve 35 and the passage 24'. The

controller arm 15 will be moved in a countor-clockwise direction, first connecting the motor armature to the motor supply circuit 45 and then gradually cutting out the connections of the resistance 18'19. The upward movement of the piston rod 13 willthis time produce an upward motion of the piston rod 29 at the controlling valve 20 so as to establish a balance between the position of the controller arm 15 and the position of the scale beam 26 at which the controller arm will be arrested from further movement.

The operation of my improved electromagnet valve will now be explained. If at any time the voltage of thesupply circuit should fail (the abnormal condition selected for purposes of illustration), the valve magnet winding 36 will be deenergized and the piston 37 Wlll drop to a position at which the passage 23 is closed, the piston 38 will drop to a position at which the passage 40 is opened and the passage 24 is closed, and the piston '39 will drop to aposition such that the passage 41 is opened. This will cause pressure to beapplied to the upper side of the piston 12 through the passage 40, the electromagnet valve 35, and through the passage 23' which is partly o ened. The lower side of the piston 12 will e connected to exhaust through the passage 24', the passage 41 and the passa e 43. The above condition will be establis ed at all times in case us'.

the valve magnet 36 is deenergized irres ective of the position of the pistons 21 an 22 of the pressure controlling valve 20. It is to be understood that the pistons 21 and 22 of the pressure controlling valve have normally a limited movement suchthat they will. normally never close the passages 40 and 41. The motor controller will thereby be operated so as todisconnect the motor armature 16 from the supply circuit and reinsert all of the resistance 18-19. When the abnormal condition of the supply circuit has ceased, the valve magnet 36 will be energized to raise the pistons 37, 38, and 39 to the positions-shown in the drawing, there-j by restoring full control of the pressure actuated device to the pressure controlling valve 20,

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, to ether w1th theaplparatus which I now consi er to represent t e best embodiment thereof, but I desire to have 'it understood that the apparatus shown is only illustrative and that the invention can be carried out by other means. Y

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. The combination with a pressure actuated device of a pressure controlling valve for admitting pressure to and exhausting pressure from the said device, means automatically operated in response to a predetermined condition connected to the said valve for operating the same, fluid passages between the valve and the. pressure actuated device, and an electro-magneticall actuated valve governin the passages to ad mit pressure to and ex aust pressure from the saiddevice independently of the said pressure controlling valve and thereby op-' crate the ressure actuated device independently of tlie said means.

2. The combination with a pressure actuated device of a pressure controlling valve for admitting ressure to and exhausting pressure from t e said device, means automatically operated in response to a predetermined condition connected to the said valve for operating the same, connections between the said device and the said valve for returning the valve from its operated to its original position to thereby limit the operation of the said device, flu1d passages between the valve and the pressure actuated device, and an electro-magnetically controlled valve in the said passages for admitting pressure to and exhausting pressure from the ressure actuated device inde ndently o the pressure cont-rolling va ve.

3. The combination with a member automatically operated in response to a predetermined condition, of a motor controller, a pressure actuated device for operating the same, a pressure controlling valve for admitting pressure to and exhausting pressure from the pressure actuated device, connections between the said member, the said controller and the said valve for operating the said valve in one direction to cause an energized to admit through the said pressure controlling valve operation of thepressure operated actuated device and to return the said valve as the controller is operated, and an electromagnetically controlled valve controlled responsively to abnormal conditions in the motor circuit for independently admitting pres sure to and exhausting pressure from the pressure actuated devlce to effect the return of the motor controller to initial position.

4. The combination with a member automaticall ,operated in response to a termined condition, of a motor contro ler, a fluid ressure actuated device comprising a cylin er and'piston for operating the controller, a fluid pressure controlling valve for the fluid pressure actuated device, link mechanism connecting the said member, the said valve and the said, controller for operatingthe valve in one direction in response to the operation of the member and for returning the valve in response to the subsequent operation of the controller, fluid passa s between the said valve and the cylin er of the fluid pressure actuated device, and an electromagnetically controlled valve in the said passa s adapted when deuid under pressure to one side of the said pistonand'exhaust the fluid from the other side of'the iston through the pressure controllin 'va ve to cause the fluid pressure actuat device to return the motor controller to initial posipredetion independently of the control by the I said fluid pressure controlling valve.

5. The combination with a pressure actuated device, of a pressure controllin valve and an electromagnetically actuate valve, each operable between two positions for admitting pressure to and exhausting'pressure from the said device, means automaticall operated in response to a predetermine condition mechanicall connected to the said ressure controlling valve for operating t e same, and fluid passages connecting the said device, the said valves, and a source of fluid pressure whereby the electromagnetic valve in one position permits the pressure controlling valve to control the operation of the pressure actuated device and in the other position independently controls the operation of the said device.

In witness whereof, I have hereunto set my hand this 26th day of October, 1920.

CLAUDE C. RUNNER". 

